Table 2.

Properties determined by the methylene blue method.

Surface area (methylene blue)	$A_1=467.21$ Å	$A_2=507.20$ Å
Specific surface area (m2/g)	$S_1=177.02$	$S_2=192.17$
Mean pore radius (cm)	$r_1=6.52$	$r_2=6.20$
Mean pore volume (cm3)	$V_{p_1}=0.57$	$V_{p_2}=0.57$
Hollow fraction	$F_{h_1}=0.42$	$F_{h_2}=0.42$